Complete Step 498: phase 25a integration

editor/src/SelfHostingPhase25aIntegration.h

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+#pragma once
+
+// Step 498: Phase 25a Integration
+// Full self-hosting pipeline: parse -> annotate -> transpile -> workflow -> metrics.
+
+#include "SelfHostAnnotationAudit.h"
+#include "SelfHostCodebaseAudit.h"
+#include "SelfHostTranspileAudit.h"
+#include "SelfHostingMetricsReport.h"
+#include "SelfModernizationWorkflow.h"
+
+#include <string>
+#include <vector>
+
+struct Phase25aIntegrationResult {
+    CodebaseParseAudit parseAudit;
+    SelfAnnotationAuditReport annotationAudit;
+    SelfTranspileAuditReport transpileAudit;
+    ModernizationWorkflowReport workflowAudit;
+    SelfHostingMetrics metrics;
+    bool parseCoverageGate = false;      // >=95%
+    bool transpileGate = false;          // >=3 translated modules
+    bool workflowGate = false;           // deterministic modernization viable
+    bool phasePass = false;
+    std::vector<std::string> notes;
+};
+
+class SelfHostingPhase25aIntegration {
+public:
+    static Phase25aIntegrationResult runCurrentState() {
+        Phase25aIntegrationResult out;
+        out.parseAudit = SelfHostCodebaseAudit::auditDirectories({"editor/src", "editor/src/ast"});
+        out.annotationAudit = SelfHostAnnotationAudit::auditDirectories({"editor/src", "editor/src/ast"});
+        out.transpileAudit = SelfHostTranspileAudit::runDefault();
+        out.workflowAudit = SelfModernizationWorkflow::createAndRun("editor/src/AnnotationValidator.h");
+        out.metrics = SelfHostingMetricsReport::generate(
+            out.parseAudit, out.annotationAudit, out.transpileAudit, out.workflowAudit);
+
+        out.parseCoverageGate = out.parseAudit.meetsTarget(0.95);
+        out.transpileGate = static_cast<int>(out.transpileAudit.files.size()) >= 3;
+        out.workflowGate = out.workflowAudit.deterministicCount == out.workflowAudit.deterministicValidCount;
+        out.phasePass = out.parseCoverageGate && out.transpileGate && out.workflowGate;
+
+        out.notes.push_back("Phase 25a pipeline executed");
+        out.notes.push_back(out.phasePass ? "Self-hosting thesis gate passed"
+                                          : "Self-hosting thesis gate has outstanding gaps");
+        return out;
+    }
+};